Currently Being ModeratedJun 27, 2012 7:41 AM (in response to happyhour19)
Double tap the Home button and delete all those apps you don't need in multitask bar.
Do a reset (Hold Sleep/Wake and Home buttons about 10 secs or more till Apple logo appears, ignore the Slide to Power Off that appears)
Note: You will not lose any data.
Currently Being ModeratedJun 27, 2012 7:44 AM (in response to happyhour19)
It seems drastic, but I'd suggest doing a full backup of your phone, and restoring the software through iTunes. This should improve the responsiveness of your phone. You can do this periodically if you find it helps.
It should also be noted that closing all the apps from double-tapping the home button will not improve the responsiveness of the phone - those apps are suspended, and apart from the most recent ones used, they are not in active memory. Furthermore, launching new apps will remove the oldest ones from active memory.
Currently Being ModeratedJun 27, 2012 8:28 AM (in response to ckuan)
ckuan: I just did the reset and it did help to a certain extend! Apps open significantly faster (messages, contacts, even Dropbox) except for a specific app which connects to my Microsoft Exchange Server.
But I am still thinking about a complete backup-and-restore ... Depends on whether I have to fill in all registration forms once again
... When will the new iPhone be released?
Currently Being ModeratedJun 27, 2012 8:35 AM (in response to happyhour19)
Yes, 3GS is faster than 3G but it won't be quicker since the new IOS has more code and features.
If you do a backup and restore from backup, you don't have to register again, only when you restore as new.
As for the new iPhone, only Apple knows.
Currently Being ModeratedJun 27, 2012 8:44 AM (in response to happyhour19)
If you restore from your backup, no. If you restore as new (without your backup), yes.
You can try restoring from your backup and see how it works but I expect you'll need to restore as new to get the best performance.
Currently Being ModeratedJul 1, 2012 1:35 AM (in response to paulcb)
I finally executed the "restore as new"-procedure.
The overall performance is significantly better than before.
I still believe that a couple of cloud-services slow down the processing speed of the iPhone. After the complete reset I first started to re-activate the non-cloud apps. They were starting and working quite fast. After that I launches email-services. That had no effect on speed.
Finally I re-installed cloud apps like Dropbox, exchange server syncs, iCloud-features etc. These apps slowed down after a couple of starts, and so did some of the non-cloud apps. But overall the speed gained by a complete reset is noticeable.
Thank you very much for your advice.